Hi there, I believe this vehicle is very much different than the '05-'10 Cobalts this forum focuses on. Based on what I see, the '11+ Cobalts are based on the Gamma II platform, and thus are related to the Sonic.
For the Sonic, the child safety lock button is actually on the center console, next to the traction control button:
That said, I am not sure if that feature carries over to the South American Cobalt. They may be in the rear doors, like most are.
Further research shows that button to be replaced with a trunk release on the sedans, so I'm not sure if perhaps just the Sonic hatches have the power child locks or not. It's very possible that the SA Cobalt doesn't have an interior trunk release button at all - the Cruze didn't get one until 2015.
Alright so I was thinking, a lot of us see each others cars at different places but don't know if it's someone on here or not. So I
figured, why not make a roster sheet for all the countries, states and counties with a little info about drivers.
It'll go like this: